Question

Total internal reflection occurs when the angle of incidence

a. exceeds the critical angle.
b. equals the angle of reflection.
c. is less than the critical angle.
d. is zero.

Answer 1

Total internal reflection occurs when the angle of incidence when it exceeds the critical angle. When waves reaches the boundary of the different materials or when it exceeds that the time when total internal reflection occurs. It says that the larger the angle the smaller the fraction of light transmitted.